A heating device and a heating method for high-pressure rotor low-cycle fatigue test

Abstract

The application relates to the technical field of rotor low-cycle fatigue test, and more particularly discloses a heating device and a heating method for high-pressure rotor low-cycle fatigue test, which comprises a positioning and sealing assembly, a sealing and heat preservation assembly is fixedly installed on the inner side of the positioning and sealing assembly, a pressure cooling assembly is fixedly connected to the bottom of the inner side of the sealing and heat preservation assembly, and a crack detection assembly is fixedly connected to the top of the pressure cooling assembly; when the rotor is broken or damaged, the rotor will shake in the rotating process, then the stress of the four periphery telescopic clamping blocks on the inner side of the positioning and detection assembly will be uneven, part of the telescopic clamping blocks will be telescoped in the rotating process of the rotor, then the telescopic shaking condition of the pushing inclined surface is detected through the first position detection assembly, whether the rotor is damaged can be detected in time, and the automatic detection of the rotor is facilitated.

Description

Technical Field

[0001] This invention relates to the field of rotor low-cycle fatigue testing technology, and more specifically to a heating device and heating method for low-cycle fatigue testing of high-pressure rotors. Background Technology

[0002] As a core component of various rotating machinery, the reliability and durability of high-pressure rotors directly affect the operational safety and service life of the entire equipment. In actual working environments, high-pressure rotors need to withstand complex load conditions, including high temperature, high pressure, and repeated start-stop cycles. These factors all have a significant impact on the rotor's fatigue performance. Therefore, conducting low-cycle fatigue tests on high-pressure rotors has become an important means of evaluating their performance and predicting their service life.

[0003] Existing testing devices for high-pressure rotor fatigue testing have significant shortcomings in damage detection. When the rotor breaks or suffers other damage during the test, existing equipment lacks effective real-time monitoring methods and cannot determine the rotor's damage state based on vibrations during operation, thus affecting the accuracy of test data. Traditional rotor positioning methods often employ fixed clamping structures, which cannot adaptively adjust to the rotor's actual dimensions, resulting in low positioning accuracy and difficulty in timely detection of rotor damage.

[0004] In terms of temperature control and environmental simulation, high-pressure rotors are often in high-temperature environments during actual operation. However, the insulation performance of existing test equipment is poor, making it impossible to effectively maintain the temperature conditions required for the test. At the same time, the lack of a flexible temperature adjustment mechanism makes it impossible to adjust the rotor's temperature conditions according to different test requirements, making it difficult to simulate the impact of temperature changes on rotor fatigue performance under real working conditions. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a heating device and heating method for low-cycle fatigue testing of high-pressure rotors, so as to solve the problems existing in the background art.

[0006] This invention provides the following technical solution: a heating device for low-cycle fatigue testing of a high-pressure rotor, comprising a positioning and sealing assembly, a sealing and heat-insulating assembly fixedly installed on the inner side of the positioning and sealing assembly, a pressure cooling assembly fixedly connected to the bottom of the inner side of the sealing and heat-insulating assembly, a crack detection assembly fixedly connected to the top of the pressure cooling assembly, and positioning detection assemblies fixedly installed on the top of both the inner side of the positioning and sealing assembly and the top of the pressure cooling assembly, with the two positioning detection assemblies facing opposite directions. A rotor is installed inside the positioning detection assembly, and the positioning detection assembly includes a second positioning circular plate. The second positioning circular plate is connected to a sealing and fastening plate via a bearing, and first limiting plates are installed on all four sides of the inner side of the second positioning circular plate, with the first limiting plates being away from the second positioning circular plate. A telescopic clamping block is fixedly connected to one side of the positioning circular plate. A pushing inclined surface is provided on the top of the telescopic clamping block. A first spring is fixedly connected to the side of the first limiting plate near the second positioning circular plate. A first position detection component is installed inside the first spring. The crack detection component includes a fixing plate. A telescopic positioning sleeve is fixedly connected to the side of the fixing plate near the rotor. A second limiting plate is provided inside the telescopic positioning sleeve. A detection block is fixedly connected to the side of the second limiting plate away from the fixing plate. A second inclined surface is provided on both the front and back of the detection block. A second spring is fixedly connected to the side of the second limiting plate away from the detection block. A second position detection component is installed inside the second spring. The first connecting hole is located between the heat preservation cylinder and the heating positioning cylinder.

[0007] Furthermore, the positioning and sealing assembly includes a positioning base plate, a supporting positioning rod is fixedly connected to the top of the positioning base plate, a sealing fastening plate is installed on the outside of the supporting positioning rod, a positioning bolt is threaded on the outside of the supporting positioning rod, and a positioning support cylinder is fixedly connected to the bottom of the sealing fastening plate.

[0008] Furthermore, the sealing and insulation component includes a positioning support ring, a sealing circular plate fixedly connected to the bottom of the positioning support ring, a first circular hole opened at the bottom of the sealing circular plate, a sealing groove opened at the top of the positioning support ring, a first connecting hole opened on the inner side of the top of the positioning support ring, a first positioning hole opened on the outer side of the top of the positioning support ring, a heating positioning cylinder fixedly connected to the inner side of the positioning support ring, and an insulation cylinder fixedly connected to the top of the positioning support ring. Both the top of the insulation cylinder and the heating positioning cylinder have sealing positioning grooves opened, and a heating module is fixedly connected to the inner side of the heating positioning cylinder.

[0009] Furthermore, the pressure cooling assembly includes a pressure tank assembly. A gas pipe is fixedly connected to the top of the pressure tank assembly. A solenoid valve is installed on the outside of the gas pipe. A flow circulation pipe is installed on the outside of the pressure tank assembly. A first positioning circular plate is installed on the outside of the flow circulation pipe. A quick-release connector is fixedly connected to the end of the flow circulation pipe away from the pressure tank assembly. A return pipe is fixedly connected to the end of the flow circulation pipe away from the pressure tank assembly via a quick-release connector. A third pressure pump is installed on the flow circulation pipe. The pressure tank assembly includes a pressure tank body. Two limiting rings are fixedly connected to the inner side of the pressure tank body. A sealing push plate is provided between the two limiting rings on the inner side of the pressure tank body. A first pressure pump is fixedly connected to the top of one side of the pressure tank body, and a second pressure pump is fixedly connected to the bottom of one side of the pressure tank body.

[0010] Furthermore, a sealing top cover is installed on the top of the sealing and heat-insulating component. The sealing top cover includes a sealing cover body. Two sealing strips are fixedly connected to the bottom of the sealing cover body. A second positioning hole is opened on the outer side of the top of the sealing cover body. A second connecting hole is opened on the inner side of the bottom of the sealing cover body. A heat-insulating groove is opened on the inner side of the sealing cover body. A sealing ring is installed on the inner side of the sealing cover body. Limiting rings are installed on the top and bottom of the outer side of the sealing ring.

[0011] Furthermore, the sealing top cover includes a sealing cover body, with two sealing strips fixedly connected to the bottom of the sealing cover body. A second positioning hole is provided on the outer side of the top of the sealing cover body, a second connecting hole is provided on the inner side of the bottom of the sealing cover body, a heat insulation groove is provided on the inner side of the sealing cover body, a sealing ring is installed on the inner side of the sealing cover body, and limit rings are installed on the top and bottom of the outer side of the sealing ring.

[0012] Furthermore, the crack detection assembly includes a fixing plate, a telescopic positioning sleeve is fixedly connected to the side of the fixing plate near the rotor, a second limiting plate is provided on the inner side of the telescopic positioning sleeve, a detection block is fixedly connected to the side of the second limiting plate away from the fixing plate, a second inclined surface is provided on both the front and back of the detection block, a second spring is fixedly connected to the side of the second limiting plate away from the detection block, and a second position detection assembly is installed on the inner side of the second spring.

[0013] Furthermore, the second positioning circular plate is provided with expansion grooves on all four sides, and the cross-sectional dimensions of the expansion grooves of the second positioning circular plate and the cross-sectional dimensions of the first limiting plate are fitted with a clearance fit, the cross-sectional dimensions of the opening of the expansion grooves of the second positioning circular plate and the cross-sectional dimensions of the pushing inclined surface are fitted with a clearance fit, and the cross-sectional dimensions of the sealing strip and the cross-sectional dimensions of the sealing positioning groove are fitted with a clearance fit.

[0014] Furthermore, the first connecting hole is located between the heat-insulating cylinder and the heating positioning cylinder, the cross-sectional dimensions of the inner side of the telescopic positioning sleeve and the dimensions of the second limiting plate are fitted with a clearance, and the cross-sectional dimensions at the opening of the telescopic positioning sleeve and the cross-sectional dimensions on one side of the detection block are fitted with a clearance.

[0015] Furthermore, a heating method for a heating device used in low-cycle fatigue testing of a high-pressure rotor includes the following steps: S1. The heating module heats the space inside the heating positioning cylinder. The temperature is adjusted according to the actual experimental temperature. The heating modules are evenly distributed to ensure that the temperature inside the heating positioning cylinder rises evenly. The temperature decreases towards the inside, creating a temperature difference between the inside and outside of the heating positioning cylinder, which helps to simulate the working environment of the rotor. S2. When it is necessary to reduce the internal temperature of the heating and positioning cylinder, coolant or water is injected into the bottom of the inner side of the pressure tank body through the second pressure pump. The water is then discharged from the quick-release joint through the guide circulation pipe, which can adjust the temperature of the heating and positioning cylinder. S3. When it is necessary to recycle the coolant or water source, the third pressure pump drives the coolant or water source at the bottom of the pressure tank assembly to circulate through the guide circulation pipe and return pipe. The temperature inside the heating positioning cylinder can be determined by monitoring the temperature of the water source inside the pressure tank assembly.

[0016] The technical effects and advantages of this invention are as follows: 1. In this invention, when testing a rotor, the rotor to be tested is installed inside two positioning detection components. When the rotor is pushed into the positioning detection components, both ends of the rotor will impact the pushing inclined surface, and then push the telescopic clamping block and the first limiting plate to retract into the positioning grooves around the inner side of the second positioning circular plate until the telescopic clamping block is in contact with the rotor's drive shaft and stops. Then, during the rotor rotation detection process, if the rotor breaks or is otherwise damaged, it will cause vibration during the rotor rotation. This will cause uneven force on the telescopic clamping blocks around the inner side of the positioning detection components, causing some telescopic clamping blocks to extend and retract during the rotor rotation. The first position detection component detects the extension and vibration of the pushing inclined surface, which can detect whether the rotor is damaged in a timely manner, thus facilitating automatic detection of the rotor. 2. The present invention, through the combination of the first detection component and the positioning detection component, can monitor the operation of the rotor from multiple angles, which facilitates timely detection of rotor abnormalities, provides effective feedback on whether the rotor is normal or not, and facilitates monitoring of the rotor's ultimate fatigue value. 3. This invention can adjust the temperature distribution inside the heating and positioning cylinder, thereby adjusting the temperature of the rotor, facilitating the testing of the rotor's ultimate fatigue value under different temperature differences, and making it convenient for monitoring personnel to use. Furthermore, when the quick-release connector is closed so that the flow circulation pipe cannot discharge liquid, injecting liquid into the inside of the pressure tank assembly can adjust the air pressure of the isolation space, and injecting gas can adjust the pressure of the water source, allowing users to adjust the air pressure or water pressure according to their actual needs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic cross-sectional view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the positioning and sealing assembly structure of the present invention; Figure 4 This is a schematic diagram of the sealing and heat-insulating component structure of the present invention; Figure 5 This is a schematic diagram of the pressure cooling assembly structure of the present invention; Figure 6 This is a schematic diagram of the pressure tank assembly structure of the present invention; Figure 7 This is a schematic diagram of the positioning detection component structure of the present invention; Figure 8 This is a schematic diagram of the sealing top cover structure of the present invention; Figure 9 This is a schematic diagram of the crack detection component structure of the present invention.

[0018] The attached figures are labeled as follows: 1. Positioning and sealing assembly; 101. Positioning base plate; 102. Support positioning rod; 103. Sealing fastening plate; 104. Positioning bolt; 105. Positioning support cylinder; 2. Sealing and heat insulation assembly; 201. Positioning support ring; 202. Sealing circular plate; 203. First circular hole; 204. Sealing groove; 205. First connecting hole; 206. First positioning hole; 207. Heat insulation cylinder; 208. Heating positioning cylinder; 209. Sealing positioning groove; 2010. Heating module; 3. Pressure cooling assembly; 301. Pressure tank assembly; 3011. Pressure tank body; 3012. Limiting ring; 3013. Sealing push plate; 3014. First pressure pump; 3015. Second pressure pump; 302. Gas pipe; 303. Solenoid valve; 304. Flow guide circulation... 305. Ring pipe; 306. First positioning circular plate; 307. Quick-release connector; 308. Return pipe; 309. Third pressure pump; 4. Positioning detection assembly; 401. Second positioning circular plate; 402. First limiting plate; 403. Telescopic clamping block; 404. Pushing inclined surface; 405. First spring; 406. First position detection assembly; 5. Rotor; 6. Sealing top cover; 601. Sealing cover body; 602. Sealing strip; 603. Second positioning hole; 604. Insulation groove; 605. Sealing ring; 606. Limiting ring; 607. Second connecting hole; 7. Crack detection assembly; 701. Fixing plate; 702. Telescopic positioning sleeve; 703. Second limiting plate; 704. Detection block; 705. Second inclined surface; 706. Second spring; 707. Second position detection assembly. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The heating device and heating method for low-cycle fatigue testing of high-pressure rotors involved in the present invention are not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Reference Figures 1 to 9 This invention provides a heating device for low-cycle fatigue testing of a high-pressure rotor, comprising a positioning and sealing assembly 1, a sealing and heat preservation assembly 2 fixedly installed on the inner side of the positioning and sealing assembly 1, a pressure cooling assembly 3 fixedly connected to the bottom of the inner side of the sealing and heat preservation assembly 2, a crack detection assembly 7 fixedly connected to the top of the pressure cooling assembly 3, a sealing top cover 6 installed on the top of the sealing and heat preservation assembly 2, and positioning detection assemblies 4 fixedly installed on both the bottom of the inner side of the sealing and heat preservation assembly 2 and the top of the pressure cooling assembly 3, with the two positioning detection assemblies 4 facing opposite directions, and a rotor 5 installed on the inner side of the positioning detection assembly 4.

[0021] In a preferred embodiment, the positioning and sealing assembly 1 includes a positioning base plate 101, a supporting positioning rod 102 is fixedly connected to the top of the positioning base plate 101, a sealing fastening plate 103 is installed on the outside of the supporting positioning rod 102, a positioning bolt 104 is threaded on the outside of the supporting positioning rod 102, and a positioning support cylinder 105 is fixedly connected to the bottom of the sealing fastening plate 103.

[0022] In a preferred embodiment, the sealing and heat-insulating assembly 2 includes a positioning support ring 201. A sealing circular plate 202 is fixedly connected to the bottom of the positioning support ring 201. A first circular hole 203 is provided at the bottom of the sealing circular plate 202. A sealing groove 204 is provided at the top of the positioning support ring 201. A first connecting hole 205 is provided on the inner side of the top of the positioning support ring 201. A first positioning hole 206 is provided on the outer side of the top of the positioning support ring 201. A heating positioning cylinder 208 is fixedly connected to the inner side of the positioning support ring 201. A heat-insulating cylinder 207 is fixedly connected to the top of the positioning support ring 201. Both the heat-insulating cylinder 207 and the heating positioning cylinder 208 have sealing positioning grooves 209 at their tops. A heating module 2010 is fixedly connected to the inner side of the heating positioning cylinder 208. The heating module 2010 can be an eddy current heating device or a resistance heating device, whichever meets the heating requirements of the present invention. The present invention does not specifically limit it.

[0023] In a preferred embodiment, the pressure cooling assembly 3 includes a pressure tank assembly 301. A gas pipe 302 is fixedly connected to the top of the pressure tank assembly 301. A solenoid valve 303 is installed on the outside of the gas pipe 302. A flow circulation pipe 304 is installed on the outside of the pressure tank assembly 301. A first positioning circular plate 305 is installed on the outside of the flow circulation pipe 304. A quick-release connector 306 is fixedly connected to one end of the flow circulation pipe 304 away from the pressure tank assembly 301. A return pipe 307 is fixedly connected to the other end of the flow circulation pipe 304 away from the pressure tank assembly 301 via the quick-release connector 306. A third pressure pump 308 is installed on the flow circulation pipe 304. The pressure tank assembly 301 includes a pressure tank main unit. The pressure tank body 3011 has two limiting rings 3012 fixedly connected to its inner side. A sealing push plate 3013 is provided between the two limiting rings 3012 on the inner side of the pressure tank body 3011. A first pressure pump 3014 is fixedly connected to the top of one side of the pressure tank body 3011, and a second pressure pump 3015 is fixedly connected to the bottom of one side of the pressure tank body 3011. During testing, coolant is injected into the pressure tank body 3011 through the second pressure pump 3015, and then flows back to the inside of the pressure tank assembly 301 through the guide circulation pipe 304 and the return pipe 307. Alternatively, the quick-release connector 306 can be removed to drain the coolant from the equipment. During the return flow, the third pressure pump 3015... When pressure pump 308 operates, it can adjust the temperature distribution inside the heating and positioning cylinder 208, thereby adjusting the temperature of rotor 5. This facilitates testing the ultimate fatigue value of rotor 5 under different temperature differences, making it convenient for monitoring personnel. Furthermore, after the quick-release connector 306 is disassembled and sealed by the sealing cap to prevent liquid from draining from the flow circulation pipe 304, injecting liquid into the inside of the pressure tank assembly 301 can adjust the air pressure in the space above the sealing push plate 3013. Injecting gas can adjust the water pressure, allowing users to adjust the air or water pressure according to actual usage. After rotor 5 is installed, gas is injected into the pressure tank body 3011 through the first pressure pump 3014, and then... By opening the solenoid valve 303, gas is injected into the top of the sealing groove 204 through the gas pipe 302, and the first connecting hole 205 connects the sealing groove 204 and the space between the insulation cylinder 207 and the heating positioning cylinder 208. The space between the insulation cylinder 207 and the heating positioning cylinder 208 is connected to the insulation groove 604 through the second connecting hole 607, so that the gas can fill the space between the insulation groove 604, the sealing groove 204, and the insulation cylinder 207 and the heating positioning cylinder 208. This can effectively keep the space inside the sealing and insulation component 2 warm, and the gas pressure and gas type of the isolation space can be adjusted according to the actual working needs, making it convenient for users to use.

[0024] In a preferred embodiment, the positioning detection component 4 includes a second positioning circular plate 401. The inner side of the second positioning circular plate 401 has four telescopic positioning grooves. A first spring 405 is fixedly connected to the inner side of the telescopic positioning grooves of the second positioning circular plate 401. A first limiting plate 402 is fixedly connected to the side of the first spring 405 away from the second positioning circular plate 401. A telescopic clamping block 403 is fixedly connected to the side of the first limiting plate 402 away from the first spring 405. The top of the telescopic clamping block 403 has a pushing inclined surface 404. A first position detection component 406 is fixedly connected to the inner side of the telescopic positioning grooves of the second positioning circular plate 401. When testing the rotor, the rotor to be tested is installed inside the two positioning detection components 4, and when the rotor is pushed into the positioning detection component 4... The two ends of the rotor will impact the pushing inclined surface 404, and then push the telescopic clamping block 403 and the first limiting plate 402 to retract into the positioning groove around the inner side of the second positioning circular plate 401 until the telescopic clamping block 403 is in contact with the drive shaft of the rotor 5 and stops. Then, during the rotation detection of the rotor 5, if the rotor 5 is broken or otherwise damaged, it will cause the rotor 5 to vibrate during rotation. This will cause uneven force on the telescopic clamping block 403 around the inner side of the positioning detection component 4, causing some of the telescopic clamping blocks 403 to extend and retract during the rotation of the rotor 5. Then, by detecting the extension and vibration of the pushing inclined surface 404 through the first position detection component 406, it is possible to detect whether the rotor 5 is damaged in a timely manner, which facilitates the automatic detection of the rotor 5.

[0025] In a preferred embodiment, the sealing top cover 6 includes a sealing cover body 601. Two sealing strips 602 are fixedly connected to the bottom of the sealing cover body 601. A second positioning hole 603 is provided on the outer side of the top of the sealing cover body 601. A second connecting hole 607 is provided on the inner side of the bottom of the sealing cover body 601. A heat preservation groove 604 is provided on the inner side of the sealing cover body 601. A sealing ring 605 is installed on the inner side of the sealing cover body 601. Limiting rings 606 are installed on the top and bottom of the outer side of the sealing ring 605. The second positioning hole 603 is installed on the outer side of the support positioning rod 102. The sealing ring 605 is sleeved on the outer side of the top positioning shaft of the rotor 5, and the sealing strips 602 are located inside the sealing positioning groove 209 to ensure the sealing of the inner side of the heating positioning cylinder 208.

[0026] In a preferred embodiment, the crack detection component 7 includes a fixing plate 701. A telescopic positioning sleeve 702 is fixedly connected to the side of the fixing plate 701 near the rotor 5. A second limiting plate 703 is provided on the inner side of the telescopic positioning sleeve 702. A detection block 704 is fixedly connected to the side of the second limiting plate 703 away from the fixing plate 701. A second inclined surface 705 is provided on both the front and back of the detection block 704. A second spring 706 is fixedly connected to the side of the second limiting plate 703 away from the detection block 704. A second position detection component 707 is installed on the inner side of the second spring 706. A first connecting hole 205 is located between the heat insulation cylinder 207 and the heating positioning cylinder 208. When testing the rotor 5, the detection block 704 is in contact with the rotor. On the outside of rotor 5, when the detection block 704 aligns with the notch of rotor 5, the detection block 704 will move inward under the action of the second spring 706. Then, under the continuous rotation of rotor 5, it will push the second inclined surface 705 to retract inward to the telescopic positioning sleeve 702. The vibration of the detection block 704 is monitored by the second position detection component 707. If the rotor 5 has cracks or damage, the movement path of the detection block 704 will be abnormal. The combination of crack detection component 7 and positioning detection component 4 can monitor the operation of rotor 5 from multiple angles, which is convenient to detect whether rotor 5 is abnormal in time, and can effectively reflect whether rotor 5 is normal or not, and can monitor the ultimate fatigue value of rotor 5. It should be specifically noted in this invention that the first position detection component 406 and the second position detection component 707 can be any one of a photoelectric sensor, a proximity sensor, a laser displacement sensor, and an encoder, as long as they can meet the monitoring requirements of this invention. This invention does not impose any specific limitations on them.

[0027] In a preferred embodiment, a heating method for a heating device used in low-cycle fatigue testing of a high-pressure rotor includes the following steps: S1. The heating module 2010 heats the space inside the heating and positioning cylinder 208. The temperature is adjusted according to the actual experimental temperature. The heating modules 2010 are evenly distributed to make the temperature inside the heating and positioning cylinder 208 rise evenly. The temperature decreases as you go inward, so that there is a temperature difference between the outside and inside of the heating and positioning cylinder 208, which is convenient to simulate the working environment of the rotor 5. S2. When it is necessary to reduce the internal temperature of the heating and positioning cylinder 208, coolant or water is injected into the bottom of the inner side of the pressure tank body 3011 through the second pressure pump 3015. Then, it is discharged from the quick-release joint 306 through the guide circulation pipe 304, so that the temperature of the heating and positioning cylinder 208 can be adjusted. S3. When it is necessary to recycle the coolant or water source, the coolant or water source at the bottom of the pressure tank assembly 301 is driven to circulate through the guide circulation pipe 304 and the return pipe 307 by the operation of the third pressure pump 308. The temperature inside the heating positioning cylinder 208 can be determined by monitoring the temperature of the water source inside the pressure tank assembly 301 by setting an IoT thermometer.

[0028] The working principle of this invention is as follows: When testing the rotor, the rotor to be tested is installed inside the two positioning detection components 4. When the rotor 5 is pushed into the positioning detection component 4, the two ends of the rotor will hit the pushing inclined surface 404, and then push the telescopic clamping block 403 and the first limiting plate 402 to retract into the positioning groove around the inner side of the second positioning circular plate 401 until the telescopic clamping block 403 fits against the drive shaft of the rotor 5 and stops. During the rotation detection of the rotor 5, if the rotor 5 is broken or otherwise damaged, it will cause the rotor 5 to vibrate during rotation. This will cause uneven force on the telescopic clamping block 403 around the inner side of the positioning detection component 4, causing some of the telescopic clamping blocks 403 to extend and retract during the rotation of the rotor 5. The first position detection component 406 detects the extension and vibration of the pushing inclined surface 404, which can detect whether the rotor 5 is damaged in time, thus facilitating automatic detection of the rotor 5. When testing the rotor 5, the detection block 704 is attached to the outer side of the rotor 5. When the detection block 704 is aligned with the notch of the rotor 5, it will move inward under the action of the second spring 706. Then, under the continuous rotation of the rotor, it will push the second inclined surface 705 to retract inward to the telescopic positioning sleeve 702. The vibration of the detection block 704 is monitored by the second position detection component 707. If the rotor 5 has cracks or damage, the movement path of the detection block 704 will be abnormal. The combination of the crack detection component 7 and the positioning detection component 4 can monitor the operation of the rotor 5 from multiple angles, which can facilitate the timely detection of whether the rotor 5 is abnormal, effectively reflect whether the rotor 5 is normal or not, and monitor the ultimate fatigue value of the rotor 5. After the rotor 5 is installed, gas is injected into the pressure tank body 3011 by the first pressure pump 3014. Then, the solenoid valve 303 is opened to allow the gas to be injected into the top of the sealing groove 204 through the gas pipe 302. The first connecting hole 205 connects the sealing groove 204 and the space between the insulation cylinder 207 and the heating positioning cylinder 208. The space between the insulation cylinder 207 and the heating positioning cylinder 208 is connected to the insulation groove 604 through the second connecting hole 607. This allows the gas to fill the space between the insulation groove 604, the sealing groove 204, and the insulation cylinder 207 and the heating positioning cylinder 208. This effectively insulates the space inside the sealing and insulation component 2. The gas pressure and gas type of the isolation space can be adjusted according to the actual working requirements, making it convenient for users to use. During testing, coolant is injected into the pressure tank body 3011 via the second pressure pump 3015, and then flows back to the inside of the pressure tank assembly 301 through the guide circulation pipe 304 and the return pipe 307. Alternatively, the quick-release connector 306 can be removed to drain the coolant from the equipment. During the return flow, the third pressure pump 308 operates to adjust the temperature distribution inside the heating positioning cylinder 208, thereby adjusting the temperature of the rotor 5. This facilitates testing the ultimate fatigue value of the rotor 5 under different temperature differences, making it convenient for monitoring personnel to use. Furthermore, when the quick-release connector 306 is disassembled and the sealing cap is used to prevent the guide circulation pipe 304 from draining liquid, injecting liquid into the inside of the pressure tank assembly 301 can adjust the air pressure in the space above the sealing push plate 3013. Injecting gas can adjust the pressure of the water source, allowing users to adjust the air or water pressure according to actual usage conditions.

[0029] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other. In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A heating device for low-cycle fatigue testing of a high-pressure rotor, comprising a positioning and sealing assembly, characterized in that: A sealing and heat-insulating component is fixedly installed inside the positioning and sealing component. A pressure cooling component is fixedly connected to the bottom of the inner side of the sealing and heat-insulating component. Positioning detection components are fixedly installed at both the bottom of the inner side of the sealing and heat-insulating component and the top of the pressure cooling component. A rotor is installed inside the positioning detection component. The positioning detection component includes a second positioning circular plate. Telescopic positioning grooves are formed on the four sides of the inner side of the second positioning circular plate. A first spring is fixedly connected to the inner side of the telescopic positioning groove of the second positioning circular plate. A first limiting plate is fixedly connected to the side of the first spring away from the second positioning circular plate. A telescopic... The clamping block has a pushing inclined surface at its top. A first position detection component is fixedly connected to the inner side of the telescopic positioning groove of the second positioning circular plate. A crack detection component is fixedly connected to the top of the pressure cooling component. The crack detection component includes a fixing plate. A telescopic positioning sleeve is fixedly connected to the side of the fixing plate near the rotor. A second limiting plate is provided on the inner side of the telescopic positioning sleeve. A detection block is fixedly connected to the side of the second limiting plate away from the fixing plate. A second inclined surface is provided on both the front and back of the detection block. A second spring is fixedly connected to the side of the second limiting plate away from the detection block. A second position detection component is installed on the inner side of the second spring.

2. The heating device for low-cycle fatigue testing of a high-pressure rotor according to claim 1, characterized in that: The positioning and sealing assembly includes a positioning base plate, a supporting positioning rod fixedly connected to the top of the positioning base plate, a sealing fastening plate installed on the outside of the supporting positioning rod, a positioning bolt threaded on the outside of the supporting positioning rod, and a positioning support cylinder fixedly connected to the bottom of the sealing fastening plate.

3. The heating device for low-cycle fatigue testing of a high-pressure rotor according to claim 2, characterized in that: The sealing and insulation assembly includes a positioning support ring, a sealing circular plate fixedly connected to the bottom of the positioning support ring, a first circular hole opened at the bottom of the sealing circular plate, a sealing groove opened at the top of the positioning support ring, a first connecting hole opened on the inner side of the top of the positioning support ring, a first positioning hole opened on the outer side of the top of the positioning support ring, a heating positioning cylinder fixedly connected to the inner side of the positioning support ring, and an insulation cylinder fixedly connected to the top of the positioning support ring. Both the insulation cylinder and the heating positioning cylinder have sealing positioning grooves opened at their tops. A heating module is fixedly connected to the inner side of the heating positioning cylinder. The first connecting hole is located between the insulation cylinder and the heating positioning cylinder.

4. The heating device for low-cycle fatigue testing of a high-pressure rotor according to claim 3, characterized in that: The pressure cooling assembly includes a pressure tank assembly. A gas pipe is fixedly connected to the top of the pressure tank assembly. A solenoid valve is installed on the outside of the gas pipe. A flow circulation pipe is installed on the outside of the pressure tank assembly. A first positioning circular plate is installed on the outside of the flow circulation pipe. A quick-release connector is fixedly connected to the end of the flow circulation pipe away from the pressure tank assembly. A return pipe is fixedly connected to the end of the flow circulation pipe away from the pressure tank assembly via a quick-release connector. A third pressure pump is installed on the flow circulation pipe. The pressure tank assembly includes a pressure tank body. Two limiting rings are fixedly connected to the inner side of the pressure tank body. A sealing push plate is provided between the two limiting rings on the inner side of the pressure tank body. A first pressure pump is fixedly connected to the top of one side of the pressure tank body, and a second pressure pump is fixedly connected to the bottom of one side of the pressure tank body.

5. The heating device for low-cycle fatigue testing of a high-pressure rotor according to claim 4, characterized in that: The sealing and heat-insulating component is equipped with a sealing top cover, which includes a sealing cover body. Two sealing strips are fixedly connected to the bottom of the sealing cover body. A second positioning hole is opened on the outer side of the top of the sealing cover body, and a second connecting hole is opened on the inner side of the bottom of the sealing cover body. A heat-insulating groove is opened on the inner side of the sealing cover body, and a sealing ring is installed on the inner side of the sealing cover body. Limiting rings are installed on the top and bottom of the outer side of the sealing ring.

6. The heating method of the heating device for low-cycle fatigue testing of a high-pressure rotor according to any one of claims 1-5, characterized in that: Includes the following steps: S1. The heating module heats the space inside the heating positioning cylinder. The temperature is adjusted according to the actual experimental temperature. The heating modules are evenly distributed to ensure that the temperature inside the heating positioning cylinder rises evenly. The temperature decreases towards the inside, creating a temperature difference between the outer and inner sides of the heating positioning cylinder, which is conducive to simulating the working environment of the rotor. S2. When it is necessary to reduce the internal temperature of the heating and positioning cylinder, coolant or water is injected into the bottom of the inner side of the pressure tank body through the second pressure pump. The water is then discharged from the quick-release joint through the guide circulation pipe, which can adjust the temperature of the heating and positioning cylinder. S3. When it is necessary to recycle the coolant or water source, the third pressure pump drives the coolant or water source at the bottom of the pressure tank assembly to circulate through the guide circulation pipe and return pipe. The temperature inside the heating positioning cylinder can be determined by monitoring the temperature of the water source inside the pressure tank assembly.

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